"Sail" by Awolnation was the first hit to mention ADD (Attention Deficit Disorder) in the chorus ("Blame it on my ADD"). Lead singer Aaron Bruno put that line in because his parents and teachers often told him he had that condition, which explained his poor grades.
A gospel choir appears in Sam Smith's "Stay With Me" video, but the vocals on the song are all Smith - about 20 tracks of his voice were used to make him sound like a chorus.
"Tomorrow People" by Ziggy Marley is the first song by a Marley to crack the US Top 40; the highest Bob got was #51 with "Roots, Rock, Reggae."
Ronnie Dunn wrote "Boot Scootin' Boogie" before he teamed up with Kix Brooks to form Brooks & Dunn. It was originally recorded by the country group Asleep At The Wheel, but Brooks & Dunn did it themselves when it got its own line dance.
"Human" by The Killers was the most streamed song on Spotify in 2008, the year that the music streaming service was launched.
Mariah Carey's song "The Roof" is about her first kiss with Yankees shortstop Derek Jeter.
Their frontman (Chris Cornell) started out as their drummer, so Soundgarden takes a linear approach when it comes to songwriting. Kim explains how they do it.
In the name of song explanation, Al talks about scoring heroin for William Burroughs, and that's not even the most shocking story in this one.
Billie Jean, Delilah, Sara, Laura and Sharona - do you know who the girls in the songs really are?
Chris and his wife Tina were the rhythm section for Talking Heads when they formed The Tom Tom Club. "Genius of Love" was their blockbuster, but David Byrne only mentioned it once.
An interview with Dr. John Covach, music professor at the University of Rochester whose free online courses have become wildly popular.
Untangling the events that led to the "Stairway To Heaven" lawsuit.